Agilent Technologies 4UHV Gebrauchsanleitung Seite 100

5 Technical Information
PROFIBUS
Configuration Buffer Structure
Total buffer length: 15 bytes (4 words + 7 byte)
Tab. 22
Offset Unit/Res. Range
(byte)
0 -
1 1bit = 1mA 1mA to 100mA
2 1bit = 1mA 1mA to 100mA
3 1bit = 1mA 1mA to 100mA
4 1bit = 1mA 1mA to 100mA
5 Pressure 1 to 99 for mantissa
unit -9 to -1 for exponent
selected
7 Pressure 1 to 99 for mantissa
unit -9 to -1 for exponent
selected (see Note 1)
9 Pressure 1 to 99 for mantissa
unit -9 to -1 for exponent
selected (see Note 1)
11 Pressure 1 to 99 for mantissa
unit -9 to -1 for exponent
selected (see Note 1)
12 - (see Note 2)
13 - (see Note 2)
Note 1: Each set point value is divided into 2 bytes: one for mantissa (the value is divided by 10) and one for
exponent.
Example1: if you want to set the Set-Point A to 3.5E-5 you have to write: byte offset 4 = 35d (23hex) and byte
offset 5 = 5d (FBhex)
Example2: if you want to set the Set-Point A to 1.0E-9 you have to write: byte offset 4 = 10d (0Ahex) and byte
offset -5 = -5d (F7hex)
Note 2: This byte is divided in two nibble (4 bits), each nibble is the number of HV channel to associated to
the set point X
Example:
if you want assign the set point A to channel 2 you have to write byte offset 12 B
if you want assign the set point B to channel 3 you have to write byte offset 12 B
if you want assign the set point C to channel 4 you have to write byte offset 13 B
if you want assign the set point D to channel 1 you have to write byte offset 13 B
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Size
(byte)
1
1
1
1
1
2
2
2
2
1
1
Agilent 4UHV Ion Pump Controller User Manual
Description
B  Pressure unit ( 0= Torr, 1= mbar, 2 = Pa)
7,6
B  Auto power ON (0= NO, 1= Yes)
5
Ch1 Protect current value
Ch2 Protect current value
Ch3 Protect current value
Ch4 Protect current value
Set Point A value
The first byte is the mantissa, the second byte is the
exponent
Set Point B value
The first byte is the mantissa, the second byte is the
exponent
Set Point C value
The first byte is the mantissa, the second byte is the
exponent
Set Point D value
The first byte is the mantissa, the second byte is the
exponent
B  Set point A mapping (default = 1)
7,4
B  Set point B mapping (default = 1)
5,,0
B  Set point C mapping (default = 1)
7,4
B  Set point D mapping (default = 1)
5,,0
= 0010
7,4
= 0011
5,0
= 0100
7,4
= 0001
5,0
/ 87-900-137-01 (D)